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UserDir public_html
<Directory /home/*/public_html>
  DAV On
  AuthPAM_Enabled On
  AuthPAM_FallThrough Off  Authtype Digest  AuthName iTools
  AuthDigestDomain "/"  AllowOverride FileInfo AuthConfig Limit Indexes
  Options MultiViews Indexes SymLinksIfOwnerMatch IncludesNoExec
  <LimitExcept GET HEAD POST OPTIONS>
    require valid-user
  </LimitExcept>
</Directory>